MPC5643L_11 datasheet(19/124 Pages) FREESCALE

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Introduction

MPC5643L Microcontroller Data Sheet, Rev. 6

Preliminary—Subject to Change Without Notice

Freescale Semiconductor

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Trigger generation unit configurable in sequential mode or in triggered mode

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Trigger delay unit to compensate the delay of external low pass filter

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Double buffered global trigger unit allowing eTimer synchronization and/or ADC command generation

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Double buffered ADC command list pointers to minimize ADC-trigger unit update

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Double buffered ADC conversion command list with as many as 24 ADC commands

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Each trigger capable of generating consecutive commands

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ADC conversion command allows control of ADC channel from each ADC, single or synchronous sampling,

independent result queue selection

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DMA support with safety features

1.6.35

Cyclic Redundancy Checker (CRC) Unit

The CRC module is a configurable multiple data flow unit to compute CRC signatures on data written to its input register.

The CRC unit has the following features:

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3 sets of registers to allow 3 concurrent contexts with possibly different CRC computations, each with a selectable

polynomial and seed

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Computes 16- or 32-bit wide CRC on the fly (single-cycle computation) and stores result in internal register.

The following standard CRC polynomials are implemented:

—x8 + x4 + x3 + x2 + 1 [8-bit CRC] (supported on cut2 only)

— x16 + x12 + x5 + 1 [16-bit CRC-CCITT]

— x32 + x26 + x23 + x22 + x16 + x12 + x11 + x10 + x8 + x7 + x5 + x4 + x2 + x +1

[32-bit CRC-ethernet(32)]

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Key engine to be coupled with communication periphery where CRC application is added to allow implementation of

safe communication protocol

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Offloads core from cycle-consuming CRC and helps checking configuration signature for safe start-up or periodic

procedures

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CRC unit connected as peripheral bus on internal peripheral bus

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DMA support

1.6.36

Redundancy Control and Checker Unit (RCCU)

The RCCU checks all outputs of the sphere of replication (addresses, data, control signals). It has the following features:

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Duplicated module to guarantee highest possible diagnostic coverage (check of checker)

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Multiple times replicated IPs are used as checkers on the SoR outputs

1.6.37

Junction temperature sensor

The junction temperature sensor provides a value via an ADC channel that can be used by software to calculate the device

junction temperature.

The key parameters of the junction temperature sensor include:

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Nominal temperature range from –40 to 150 °C

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Software temperature alarm via analog ADC comparator possible

MPC5643L Datasheet(PDF) 19 Page - Freescale Semiconductor, Inc

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